Reaction of 2-aroylcyclohex-2-enones with hydroxylamine. Isoxazole ring formation.
作者:YASUMITSU TAMURA、MINAKO INOUE、AKIMORI WADA、MASANOBU FUJITA、YASUYUKI KITA
DOI:10.1248/cpb.29.3226
日期:——
A novel one-step and high-yield isoxazole formation of 2-aroylcyclohex-2-enones is described. Treatment of such an enone with hydroxylamine under acidic conditions (NH2OH·HCl in EtOH) gave the corresponding 3-aryl-6, 7-dihydro [2, 1] benzisoxazole. Changes in the reaction conditions caused marked changes in the course of the reaction. A possible mechanism for these reactions is put forward.
描述了一种新颖的一步法高收率异噁唑形成2-芳基环己-2-烯酮的方法。在酸性条件下(乙醇中的NH2OH·HCl)用羟胺处理这种烯酮,得到相应的3-芳基-6,7-二氢[2,1]苯并异噁唑。反应条件的变化导致反应过程发生显著变化。提出了这些反应的可能机理。